Sorry, I don't have specific examples on hand as it's a rather niche type of fanfiction. But it could be something like a story where Harry Potter himself gets annoyed by an anime - like character who suddenly appears in Hogwarts and starts acting in a way that goes against the Hogwarts code. And Harry tries to get rid of this character while making comments about how strange and inappropriate anime - like behavior is in the wizarding world.
I'm sorry, but I don't have specific examples of such fanfiction at hand. However, you could try searching on fanfiction websites like Archive of Our Own or FanFiction.net. Just type in the keywords 'harry potter leaves bashing crossover' and see what comes up.
One example could be if there was a lot of bashing of certain characters in the fanfiction, like Ron. Harry might leave the fanfiction because he doesn't agree with the unfair treatment of his friend. He could say something like 'I won't be part of this story that slurs Ron's name for no reason' and then just leave the narrative.
One example could be a fanfiction where the British wizarding society in Harry Potter is depicted as overly rigid and backward - thinking in contrast to other magical cultures. Maybe it shows the Ministry of Magic as being corrupt and self - serving more than in the original books, with British wizards being portrayed as less empathetic or understanding towards non - British magical beings.
Well, in certain 'Harry Potter Ginny bashing fanfiction', Ginny could be depicted as a character who uses underhanded tactics to get what she wants. For instance, she might be written as trying to manipulate Harry into doing things her way all the time. This often goes against the Ginny that we know from the original books, who was a strong and independent character. But in these fanfictions, the author may be exploring a different side of her personality or just creating a more conflict - ridden story line.
Sorry, I don't have specific examples at hand. But generally, it could be a story where Bella makes a series of bad decisions that lead to negative consequences for herself and others in the 'Twilight' world.
One example could be in a 'Star Wars' - inspired fanfiction. If there was a civil war in the Star Wars universe within the fanfiction, it might bash the war by showing how it divided the Jedi order needlessly. The fanfiction could focus on how the conflict led to the fall of many good Jedi due to political intrigue and power struggles within the order.
Some fanfictions that are overly long - winded and full of filler content can be considered the worst. They might have pages and pages of a character just thinking about nothing important or going through mundane daily activities that have no real connection to the main plot of the Harry Potter world.
One example could be a fanfic where Harry has the ability to control time without any limits, which is much more powerful than the time - turning devices in the original series. Another might be a story where Voldemort is made invincible and can defeat any opponent with a single spell, completely overpowering the other characters.
One example could be 'The Dominant Potter' where Harry discovers a new and extremely powerful form of magic early on and uses it to take charge in the fight against Voldemort. He is shown as being dominant in strategic planning and combat situations.
One example could be fanfiction that protests the lack of LGBT+ representation in the original Harry Potter series. Writers might create stories where characters are openly LGBT+, exploring their relationships and identities within the Hogwarts setting. Another could be about protesting the way house - elves were depicted. Fanfic authors may write stories where house - elves have more agency and rights, in contrast to their rather subservient portrayal in the books.